Page 58 - World of Animals - Issue #31

CONSERVING

DOLPHINS

We all love these charismatic

marine mammals, but a
surprising number of species

are in dire need of help in
order to be brought back

from the edge of extinction

Words Amy Grisdale

Dolphins are living paradoxes – animals that can’t leave
the water but can’t stay under it either. They are unique
mammals shaped by evolution to take advantage of the
bounty of food in the open ocean. Over 50 million years
ago, dolphin ancestors walked on land and snatched
up marine creatures in shallow water. In one of nature’s
most radical manoeuvres, they then took to the seas and
changed beyond recognition. The dog-like mammals
lost their hair and back legs to become extremely
streamlined. Their teeth became a uniform conical shape
and the nasal passage found its way to the back of the
head. Their pack behaviour only strengthened as they
entered the water and they became reliant on building
strong bonds with their families.
When this incredible transition began, the seas were

brimming with fish and were free from damaging
pollution or hazardous boat traffic. However, in today’s

world the ocean is a dangerous place to live. Dolphins
suddenly face fierce competition for their fish and must

share their space with enormous ships. Their sensitive
hearing is affected by roaring engines and deafening
drilling, and in some parts of the world they are even
actively hunted or kept in captivity in brutal conditions.
It’s now more crucial than ever to protect these animals
from the growing risks they face, as for some species, it’s
almost too late.
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